Rotary tooth-brush



No. 622,948. Patented Apr. "Q1399.

M. P. GILL.

ROTARY TOOTH anus.

. (Application filed May 5, 1898.)

(No Model.)

/N VE N TOR A rromvErs.

THE Nonms versus 00.. mom-uwu, WASHINGTON, u. c.

. be fully described herein after and then point- UNITED STATES PATENT OFFICE.

.MARY PARKER GILLOF LOUISVILLE, KENTUCKY.

ROTARY TOOTH-BRUSH.

SPECIFICATION forming part of Letters Patent Ala-622,948, dated April 11 1899.

' Application filed May 5, 1893. Serial No. 679,842. (No model.)

To otZZ whom, it may concern:

Be it known that I, MARY PARKER GILL, of Louisville,in the county of J efferson and State of Kentucky, have invented a new and Improved Rotary Tooth-Brush, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved rotary tooth-brush which is simple and durable in construction, easily manipulated, and arranged to bring the bristles to the inner curved surfaces of adjacent teeth to properly clean the same and at the same time protect the inside of the cheek from inp The invention consists of novel features and parts and combinations of the same, as will ed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the improvement. Fig. 2is a like view of the same with the casing in section. Fig. 3 is a sectional side elevation of the improvement. Fig. 4 is a transverse section of the same. Fig. 5 is a perspective view of the cheek-protector, and

Fig. 6 is a perspective view of the polishingbrush.

The improved tooth-brush is provided with a casing A, made of suitable material and preferably in cylindrical form, with bearings B B in the ends of the casing for a screw-rod O to rotate in. A nut D engages said screwrod and is provided with a neck D, extending through a longitudinal slot A, formed in the casing'A, the outer end of the neck carrying a button or handle D adapted to be taken hold of by the operator to move the nut D longitudinally in the casing, so as to rotate the screw-rod O.

Into one outer end of the screw-rod O is screwed or otherwise fastened the core E of a brush E, either formed of bristles, as indicated in Figs. 1, 2, and 3, or with a polishing material E, as indicated in Fig. 6, the core E of this brush being likewise arranged to permit of conveniently fastening it to the end of the screw-rod O. .A portion of the cylindrical brush E is surrounded bya cheek-protector F, made in the shape of a half-cylinder whose axis coincides with that of the brush and formed at one end with a ring F for securing the protector to the end of the casing A at the bearing 13. The protector F is also formed at one end with a bearing F for the core E or E of the brush.

Now it is evident that when the operator moves the handle D forward or backward and a rotary motion is given to the screw-rod G, as described, then the brush E is revolved with the screw-rod, and when either the cleanin g-brush or the polishing-brush is brought in contact with the teeth the latter are readily 6 5 cleaned,especialy at the inwardly-curved surfaces between adjacent teeth.

The casing A forms the handle of the device and is held in such a manner that the V uncovered portion of the brush E extends to the surfaces of the teeth, while the cheek-protector F extends to the inside of the cheek, so that the latter is not injured by the revolving of the brush when used.

By the construction described either the bristles or the polishing material can be readily interchanged on the screw-rod C, so that either can be used for properly cleaning and polishing the teeth.-

Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent- 1. A rotary tooth-brush,con1prising a longitu dinally-slotted casing,a screw-rod mounted inthe casing, a nut on the screw-rod provided with a neck projecting through the slot of the casing and carrying a handle at its end, a

semicylindrical cheek-protector secured to one end of the casing and provided with a -bearing,and a cylindrical brush provided with a projecting stem or core mounted in the hearing of the cheek-protector and projecting in to the casing and detachably secured to the screw-rod, substantially as described. 2. In a rotary tooth-brush, the combination with a casing, a screw-rod mounted in the casing, and a nut for operating the screw-rod, of a semicylindrical cheek-protector provided at one end with a ring for securing it to the 'casing, and with a bearing a short distance I00 from the ring, and a cylindrical brush having its stem or core mounted in the bearing and having its end secured in the screw-rod, sub

stan tially as described.

MARY PARKER GILL.

Witnesses:

HERBERT LoUeHRIneE, CHAS. WARREN. 

